The Kremlin said Russian President Vladimir Putin would speak to U.S. President Donald Trump by phone at 5 p.m. Moscow time (10 a.m. ET) on Monday. Trump has said he wants to meet with Putin as soon as possible, and that such a meeting was the key to unlocking progress on peace between Russia and Ukraine.

A telephone call between the two leaders would be the latest chapter in a flurry of diplomatic maneuvering over ending the three-year conflict.